Common Substance Discription: My substance is red, very

hard, sometime found in mines, and used for jewelrey! They are really beautiful! They are shiny. Can you guess what it is ? Rubies! I thought rubies are made of alluminum and carbon. Guess what I was right. Rubies are made of alluminum and carbon. Rubies are a type of gem like green emeralds, shiny, gray diamonds, and light blue sapphires. Every gem has a name and a specific color.

Elements: Carbon ( c ) and alluminum ( Al )